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Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (10): 1934-1944.doi: 10.16420/j.issn.0513-353x.2021-0613

• Research Papers • Previous Articles     Next Articles

Changes of Carotenoid Components and Expression of the Related Genes During Petal Coloring of Paeonia delavayi

ZOU Hongzhu, ZHOU Lin, HAN Lulu, LÜ Jihang, WANG Yan*()   

  1. State Forestry Administration,Key Laboratory of Tree Breeding and Cultivation,Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,China
  • Received:2021-07-28 Revised:2021-09-09 Online:2021-10-25 Published:2021-11-01
  • Contact: WANG Yan E-mail:chwy8915@sina.com

Abstract:

The yellow flower group in Paeonia delavayi is an important breeding resource. In order to clarify the changes of carotenoid components and content during petal coloring,carotenoids in the petals from four stages of flower development were analyzed qualitatively and quantitatively,and the key structural genes of PdPSY,PdZDS,PdLCYB,PdCHY,PdNXS,PdCRISTO,PdCHYB in carotenoid biosynthesis pathway and of PdCCD in degradation pathway were analyzed by Real-time fluorescence quantitative PCR. In this study,14 carotenoids were identified in the petals of Paeonia delavayi for the first time,and they were α-carotene,antheraxanthin,lycopene,zeaxanthin,violaxanthin,γ-carotene, neoxanthin,β-carotene,lutein,β-cryptoxanthin,apocarotenal,(E/Z)-phytoene,ε-carotene and α-cryptoxanthin. Among them,lutein and (E/Z)-phytoene had the highest content. With the development of flowers,the accumulation of (E/Z)-phytoene,lycopene and γ-carotene increased continuously,while the accumulation of α-carotene,β-carotene,α-cryptoxanthin,lutein,violaxanthin and neoxanthin decreased continuously. The results of Real-time quantitative PCR showed that the expression of PdPSY,PdCRISTO,PdZDS,PdLCYB and PdCCD presented an upward trend,the expression of PdCHYE,PdCHYB and PdNXS showed a downward trend,among which the expression of PdCHYB and PdNXS decreased significantly at slightly pigmented soft bud stage,and the expression of PdCHYE decreased gradually during petal coloring,which was basically consistent with the change of pigment content.

Key words: Paeonia delavayi, flower color, carotenoid, gene expression

CLC Number: